74 



Distribution. — Great Britain, reported from all the coasts, but this 

 and former species are confounded by authors. Ireland, E'orth-east 

 coast, Belfast; South «coast, Cork (?); West coast, Galway (?). 



Gentjs III. — JEgeon (Risso). 



Eostrum truncate, or bifid. Carapace : branchial and gastric regions 

 highly carinate ; abdominal somites toothed, carinated, and sculptured ; 

 telson generally sulcate ; first pair chelipeds moderate, barely surpassing 

 second in length ; second pair slender ; orbits rounded, densely hairy ; 

 antennae as family; antennal scale short. British Species : JEg. fasciatus, 

 sculptus. 



In addition, the following are pretty general : — Antennal scale not 

 twice as long as peduncle of antennae ; second pair of chelipeds stout, 

 but much shorter than first or third. 



Species I. 



Banded Shrimp.— Plate IX. 



^geon fasciatus (Risso Sp.). 



Crangon fasciatus. Kisso Crust, de Mce, t. iii., f. 5 (bad), p. 82 ; Hist. 

 Eur. Mer. v., p. 64; M. Ed., Crust., ii., p. 342 ; Bell, Brit. Crust., 

 p. 259; A. White, Pop. Hist. Brit. Crust., 187; Lucas, Exped. 

 Alg., 38 ; W. Thomps., JS'at. Hist. Ireland, iv., p. 390 ; Kin. Trans. 

 E. I. A., vol. xxiv., p. 76. 



Rostrum {r) moderate, broadly truncate at apex, deeply longitudinally 

 sulcate ; ocular notch hroad, shallow, smooth, or very sparingly ciliate on 

 outer edge only ; median gastric region armed with a tooth ; lateral gas- 

 tric sculptured ; branchial region with a short tooth; abdominal segments 

 smooth ; telson triangular, sulcate ; second pair of chelipeds shorter than 

 first or third. 



10, Eirst pair chelipeds. Eigure twice and a half life size. 



Distribution.— Great Britain, South coast. Ireland, T'J'orth-eastern 

 coast, Belfast; East coast, Dublin ; West coast, Galway. Extra-Brittanic, 

 Mediterranean. 



Species II. 



Sculptured Shrimp. — Plate IX. 



^geon Sculptus (Bell Sp.) 



Crangon sculptus. Bell. Brit. Crust., 263 ; A. White, Pop. Brit. Crust., 

 109 : Kin. Trans. R. I. A., Yol. xxiv., p. 78. 



Rostrum (r), moderate, bifid at apex, deeply concave above; ocular 

 notch moderate.^ densely ciliated all round ; carapace armed with five prin- 

 cipal toothed carince ; abdomen highly sculptured ; third to fifth somites 



